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Researchers pinpoint sharp phase transition for ellipsoid fitting

Researchers have established a sharp phase transition for fitting random vectors with an ellipsoid. This transition point is determined by the common fourth moment of the subgaussian coordinate distributions, indicating a universality phenomenon. For standard Gaussian data, this threshold is precisely 1/4, resolving a long-standing conjecture in the field. AI

RANK_REASON The cluster contains an academic paper detailing a new mathematical finding. [lever_c_demoted from research: ic=1 ai=0.1]

Read on arXiv cs.LG →

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Researchers pinpoint sharp phase transition for ellipsoid fitting

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The cluster contains an academic paper detailing a new mathematical finding. [lever_c_demoted from research: ic=1 ai=0.1]
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COVERAGE [1]

  1. arXiv cs.LG TIER_1 English(EN) · Frederic Koehler, Youngtak Sohn ·

    Universality and sharp thresholds for ellipsoid fitting

    arXiv:2608.27372v1 Announce Type: cross Abstract: We establish a sharp phase transition for fitting random vectors by an ellipsoid. The random vectors have independent subgaussian coordinates with mean zero, variance one, and a common fourth moment, and the number of vectors is p…